Thermodynamics and vaporization of the Sm2O3–ZrO2 system studied by Knudsen effusion mass spectrometry

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Thermodynamics and vaporization of the Sm₂O₃–ZrO₂ system studied by Knudsen effusion mass spectrometry. / Vorozhtcov, Viktor A.; Stolyarova, Valentina L.; Shilov, Andrey L.; Lopatin, Sergey I.; Shugurov, Sergey M.; Karachevtsev, Fedor N.

In: Journal of Physics and Chemistry of Solids, Vol. 156, 110156, 01.09.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{aca481dc3b1b484c94c31bcb146e064c,

title = "Thermodynamics and vaporization of the Sm2O3–ZrO2 system studied by Knudsen effusion mass spectrometry",

abstract = "The purpose of the present study was to examine the thermodynamic properties and vaporization processes in the Sm2O3–ZrO2 system by the Knudsen effusion mass spectrometric method (KEMS). The samples in the system under consideration were synthesized by the solid-state method using a high-energy ball mill. Vapor over the Sm2O3–ZrO2 system consisted of SmO, Sm, and O in the temperature range 2200–2540 K. Concentration dependences of the SmO and Sm partial vapor pressures, the component activities, and excess Gibbs energies were obtained at a temperature of 2452 K in the compositional range of 0.23–0.73 Sm2O3 mole fraction. These data evidenced negative deviations from the ideal behavior and a possibility to use the subregular solution model to describe the concentration dependences of the thermodynamic properties in the Sm2O3–ZrO2 system. Correlations were found between the observed changes in the thermodynamic behavior of the system mentioned and the relative number of bonds when the second coordination sphere was taken into consideration in the condensed phase calculated by the Generalized Lattice Theory of Associated Solutions.",

keywords = "Ceramics (A), Inorganic compounds (A), Oxides (A), Phase equilibria (D), Thermodynamic properties (D), Inorganic compounds, ZIRCONIA, HIGH-TEMPERATURES, SOLID-SOLUTIONS, HAFNIA, Oxides, Ceramics, SM2O3-Y2O3-HFO(2)SYSTEM, THERMAL BARRIER COATINGS, CONDUCTIVITY, Phase equilibria, OXIDES, Thermodynamic properties, CERAMICS",

author = "Vorozhtcov, {Viktor A.} and Stolyarova, {Valentina L.} and Shilov, {Andrey L.} and Lopatin, {Sergey I.} and Shugurov, {Sergey M.} and Karachevtsev, {Fedor N.}",

year = "2021",

month = sep,

day = "1",

doi = "10.1016/j.jpcs.2021.110156",

language = "English",

volume = "156",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Thermodynamics and vaporization of the Sm2O3–ZrO2 system studied by Knudsen effusion mass spectrometry

AU - Vorozhtcov, Viktor A.

AU - Stolyarova, Valentina L.

AU - Shilov, Andrey L.

AU - Lopatin, Sergey I.

AU - Shugurov, Sergey M.

AU - Karachevtsev, Fedor N.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - The purpose of the present study was to examine the thermodynamic properties and vaporization processes in the Sm2O3–ZrO2 system by the Knudsen effusion mass spectrometric method (KEMS). The samples in the system under consideration were synthesized by the solid-state method using a high-energy ball mill. Vapor over the Sm2O3–ZrO2 system consisted of SmO, Sm, and O in the temperature range 2200–2540 K. Concentration dependences of the SmO and Sm partial vapor pressures, the component activities, and excess Gibbs energies were obtained at a temperature of 2452 K in the compositional range of 0.23–0.73 Sm2O3 mole fraction. These data evidenced negative deviations from the ideal behavior and a possibility to use the subregular solution model to describe the concentration dependences of the thermodynamic properties in the Sm2O3–ZrO2 system. Correlations were found between the observed changes in the thermodynamic behavior of the system mentioned and the relative number of bonds when the second coordination sphere was taken into consideration in the condensed phase calculated by the Generalized Lattice Theory of Associated Solutions.

AB - The purpose of the present study was to examine the thermodynamic properties and vaporization processes in the Sm2O3–ZrO2 system by the Knudsen effusion mass spectrometric method (KEMS). The samples in the system under consideration were synthesized by the solid-state method using a high-energy ball mill. Vapor over the Sm2O3–ZrO2 system consisted of SmO, Sm, and O in the temperature range 2200–2540 K. Concentration dependences of the SmO and Sm partial vapor pressures, the component activities, and excess Gibbs energies were obtained at a temperature of 2452 K in the compositional range of 0.23–0.73 Sm2O3 mole fraction. These data evidenced negative deviations from the ideal behavior and a possibility to use the subregular solution model to describe the concentration dependences of the thermodynamic properties in the Sm2O3–ZrO2 system. Correlations were found between the observed changes in the thermodynamic behavior of the system mentioned and the relative number of bonds when the second coordination sphere was taken into consideration in the condensed phase calculated by the Generalized Lattice Theory of Associated Solutions.

KW - Ceramics (A)

KW - Inorganic compounds (A)

KW - Oxides (A)

KW - Phase equilibria (D)

KW - Thermodynamic properties (D)

KW - Inorganic compounds

KW - ZIRCONIA

KW - HIGH-TEMPERATURES

KW - SOLID-SOLUTIONS

KW - HAFNIA

KW - Oxides

KW - Ceramics

KW - SM2O3-Y2O3-HFO(2)SYSTEM

KW - THERMAL BARRIER COATINGS

KW - CONDUCTIVITY

KW - Phase equilibria

KW - OXIDES

KW - Thermodynamic properties

KW - CERAMICS

UR - http://www.scopus.com/inward/record.url?scp=85105583468&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/40400045-099f-35d5-91bd-1a4e01940e52/

U2 - 10.1016/j.jpcs.2021.110156

DO - 10.1016/j.jpcs.2021.110156

M3 - Article

AN - SCOPUS:85105583468

VL - 156

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

M1 - 110156

ER -

ID: 76973527